package com.jsql.view.swing.tab.dnd;
   
   import javax.swing.*;
   import java.awt.*;
   
   public class GhostGlassPane extends JComponent {
       
       private DnDTabbedPane tabbedPane;
       
      protected GhostGlassPane(DnDTabbedPane tabbedPane) {
          this.tabbedPane = tabbedPane;
          this.setOpaque(false);
      }
      
      @Override
      protected void paintComponent(Graphics g) {
          this.tabbedPane.getDropLineRect().ifPresent(rect -> {
              Graphics2D g2 = (Graphics2D) g.create();
              var r = SwingUtilities.convertRectangle(this.tabbedPane, rect, this);
              g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, .5f));
              g2.setPaint(Color.RED);
              g2.fill(r);
              g2.dispose();
          });
      }
      
      public void setTargetTabbedPane(DnDTabbedPane tab) {
          this.tabbedPane = tab;
      }
  }